VISSIM 5.30-05 User Manual

Driving Behavior
● Maximum deceleration for cooperative braking: Defines if a trailing
vehicle will start cooperative braking allowing a leading vehicle to change
from an adjacent lane into its lane. If the trailing vehicle determines that it
would have to brake with a higher deceleration than this value if the
leading vehicle started the lane change, it does not start or continue
cooperative braking. A higher value will result in more braking and thus
probability of lane changing. The leading vehicle will still initiate the lane
change dependent upon the safety distance reduction factor for lane
changing and car-following parameters. Maximum values suggested are
0.7-1.0 local acceleration due to gravity (9.81 m/s², 32.2 ft/s²).
Cooperative braking uses the following:
- up to 50% of the desired deceleration (cf. section 5.1) until the
leading vehicle starts changing lanes,
- between 50% of the desired deceleration and this user-defined
Maximum deceleration. Typically, deceleration during lane changes
will be significantly lower than the Maximum deceleration, since a
lane changing leading vehicle will not expect an extremely high
deceleration of the trailing vehicle.
Note: Lane change behavior is similar to VISSIM version 4.10, if the
- Safety distance reduction factor is set to 0.0 - 0.1 and
- Maximum deceleration for cooperative braking is set to -9m/s².
● Overtake reduced speed areas: This option is off by default.
- If this option is checked, you can model lane-dependent speed
restrictions which are considered for lane changing.
If this option is not checked, vehicles never change lanes directly
upstream of a reduced speed area. Furthermore, they ignore reduced
speed areas on the target lane.
User Manual © PTV AG 2011 137